From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Photograph showing a tin-plated piston and rings after scuffing tests.
| Identifier | ExFiles\Box 145\3\ scan0174 | |
| Date | 5th April 1938 guessed | |
| 3 PISTON SCUFFING TESTS. STANDARD E.60632 PISTON (TIN-PLATED). E.60820 COMPRESSION RING. E.61123 'L' SECTION RING. E.60821 SCRAPER RING. PISTON SHOWS NO SIGN OF SCUFFING AFTER 3 TESTS ON MOBILOIL 'ARTIC', CASTROL "XL" AND MOBILOIL "A" OIL FROM DE LAVAL TEST AS USED FOR "RUNNING IN" PRODUCTION ENGINES. | ||